Citazione Stile APA (7a Edizione)

World Book (Chicago). (1989). The world book encyclopedia of science (Second 1989 printing.). World Book.

Citazione stile Chigago Style (17a edizione)

World Book (Chicago). The World Book Encyclopedia of Science. Second 1989 printing. Chicago: World Book, 1989.

Citatione MLA (9a ed.)

World Book (Chicago). The World Book Encyclopedia of Science. Second 1989 printing. World Book, 1989.